public class xiangmu2 {
    public static void main(String[] args) {
        int a=1;
        int b=8;
        int c=b-a;
        int d=a+b;
        int e=a*b;
        double f= (double) a /b;

        System.out.println(c);
        System.out.println(d);
        System.out.println(e);
        System.out.println(f);


    }
}
